[PATCH] D130754: [X86] Support ``-mindirect-branch-cs-prefix`` for call and jmp to indirect thunk

[Phoebe Wang via Phabricator via llvm-commits]

pengfei added a comment.

In D130754#3701837 <https://reviews.llvm.org/D130754#3701837>, @nikic wrote:

> This change caused a significant compile-time regression for `O0` builds (about 1%): http://llvm-compile-time-tracker.com/compare.php?from=45bae1be90472c696f6ba3bb4f8fabee76040fa9&to=6f867f9102838ebe314c1f3661fdf95700386e5a&stat=instructions
>
> At a guess, fetching a module flag for every single instruction is slow?

Thanks for reporting it. I guess so. I'll try to move it outside :)


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https://reviews.llvm.org/D130754